Surgeon&#39;s knife



N. SBEAHQLM Dec. 4 1923.,

SURGHJNS KNIFE was Dec. 4, 1923.

1 UNITED STATES 1,476,185 PATENT ()FFICE.

NILS SEAHOLK, F MOUNT VERINON, NEW YORK.

sonsson 's' 1min.

Application filed December 30, 1922. Serial No. 609,938.

To all whom it may ooncem:

Be it known that I, Nine Snanomr, a

I citizen of the United States of America,. and a resident of the cit ofMount Vernon,

county of Westchester, tats of New York,

have invented acertain Surgeons Knife, of

V which the followin isa specification.

. This invention re ates to surgeons knives,

and especially to that class in which the 710 adapted to be securedtogether as a unit knife as a pair of separable members andsimultaneously clamp. a blade between their extremities at; one end ofthe handle.

The main object of the invention is to provide a surgeon-s knife whichis furnished with a detachable blade that may be sharpened or replacedat will.

- Another object is to provide a knife whose members are readily andcheaply manufactured and allow for various designs of the handle. 4

A further object is to have a knife handle 'which is separable, andwhose members, by virtue of their form and structure, are adapted toreceive a blade in operative positionat their adjacent narrowextremities, and to receive blades for storage between their bodyportions within their outline. Further objects and attained. advantageswill appear hereinafter as this specification proceeds.

In the accompanying drawing,

Fig. 1 is a view of a knife made according to this invention.

ig. 2 is a side view of the same.

Fig. 3 isa view of the reverse sideof knife shown in Fig. 1.

Fig. 4 is an end view of Fig. 3 with the handle members in initial openposition;

Fig. 5 is an end view of Fig. 3..

Fig. 6 is a perspective view of the major handle member of the knifeshown in the previous views. Y 5

Fig. 7 is a similar view of the smaller or wedge member of the sameknife.

Fig. 8 is a view of a detached knife blade.

Throughout the views, the same reference I numerals denote the sameparts.

, When performing operations in hospitals V and in other institutions,aswell as in prifecting a patient by using the same knife that was usedon a previous case.

In order to remedy this situation, it is herein proposed to provide aknife of such character and construction that for each operation a new,sterile and perfectly keen b ads may he had.

In the practice of my invention, a handle member is provided at oneextremity with a ton s 2 and within the latter with a pair of con rgentwalls 6 and 8. The purpose of t ese wells is to rovide side limits forthe shoe 18 of a b ade 3, the shank being tapered to conform with thewalls, thus preventing direct withdrawal of the blade by forwardmovement. In order to prevent rearward movement of the blade, the latteris formed with a pair of abutment shoulders 4 and 5 which normallycontact with the extremities-of the mentioned walls 8 and 6, resectiely.

owever, in order to prevent vertical movement of the blade, a wedgemember 10 of the handle is provided witha tongue 11 adapted to fitbetween the bladelimit walls and project into a position adjacent to thetongue 2 of the other handle member 1.,

These walls are provided each with a air of retaining-hooks 7, 7 and 9,9 designs to been furnished with a stop 15 and the wedge member with acorresponding slot 14.

Themembers are so formed, that before closing the rear portion of thehandle, wed e member 10 is warped to the right while t e other member iswarped to the left to provide side draft for stop 15 when enterin slot14. When the members are squeeze together so that these locking partsengage,

they are retained thereby in assembled position as seen in Fi 1, 2, 3and 5.

It will be note that the shank 18 of the blade 3 is notched at 19, 19 inorder to clear the hooks 7, 7 or 9, 9 when inserting or removing theblade. If we then consider the assembly of the knife more directly, wemay begin by takin the major member as shown in Fig. 6, an taking theblade shown in a Fig. 8, it is inserted sideways between the retainingwalls with the notches uppermost.

Then, the" blade is laid down between the walls, the notches clearin thewall hooks, and theshoulders of the b ade just abutting the outerextremities of the walls. The ex-' tremity of the-tongue 11 of the wedge,mem-

' her is then laid on shank 18 of the blade, and the member pushediorward till shoulders handle will then appear similarly to Fig. 4,

though possibly not quite so open. But; if

the wedge member-is now withdrawn, the blade may be lifted out and laidon the wide handle portion 1 of the major member as indicated in dottedoutline vin Fig. 6. his

' but necessary to replace the wedge member into position and the bladewillbe concealed and protected within the handle as indicated in Fig. 3.2

Itis obvious that I may. make the retain inglli'ooks into longer singleledges iflound necessary, and may make the handle members sufficientlybulged to contain a lar e supply of blades, and may also various y alterthe appearance of the handle for greater utility and beauty.

Having thus fully described my-invention, I claim,

1. An instrument comprising. a pair .of similar members adapted to clampa blade shank and provided with a pair of adjacent blade reinforcingcentrally disposed opposite tongues projecting along the axis of saidmembers beyond the clamping portions thereof.

member provided with a pair of opposite limit walls adjacent oneextremity, a handle portion at the other extremity, a blade havmg ashank adapted to fit between said walls,

- "December, 1922. 2.'An instrument comprising a major and a wedgemember provided with a-thandle' portion and at'the other extremity witha reduced portion adapted to fit the space between said walls, and incombination with the major member to retain said blade shank.

39A cutting instrument including a major handle member having a handleportion and a -clamping .portion comprising a 'pair of opposite limitwalls eaclrhaving a'n opposite inwardprojection" surmounting the wallsand lyin ,paral le I- -with the main 'art of said'mem er,ia bladeadaptedto lit tween fsaid limit wallsand'project therefrom, and awedgemember having a handle portion terminating in a reduced portion adaptedto wedge between said walls and under said project1on.

-4. A cuttin instrument including in a pair of han e members a majormember rav ng a blade clampln portion at one ex;

tremity and at thehan le extremity a looking book, a blade adapted to beretained by said member and a wedge member having a wedgeportionat oneextremity ada ted to wedge said blade in said major mem r and at theother extremity provided with a seat adapted-to receive said lockinghook.

5. A- cutting'nstrument including ablade plane,"and in the other memberof a reduced '7 I portion adapted to fit ti htly between said limitwalls and under'said pair of stop shoulders adapted to contact with theextremities of said walls adjacent the handle portion, and finally, alocking means upon said handle portions to retain said instrumentassembled. 3

Signed at 132 Nassau Street, in the borou'gh of Manhattan, county ofNew. York city and State of New York this 26th day oi NILS SEAHOLM.

Witnesses:

CLARA Snauom, CARL Wu. Fonsssmzo.

projections-and a and a pair of handle members provided each

